．
being discussed
C
．
discussed
D
．
to be discussed
10
．
The situation today is quite different from _______________ it was ten years ago.
A
．
which
B
．
that
C
．
what
D
．
when
11
．
I will fly to Shanghai tomorrow morning, _______________ I plan to stay for three days.
A
．
where
B
．
there
C
．
which
D
．
in the city
12
．
Jack went to town yesterday and had his bicycle _______________ there.
A
．
to repair
B
．
repairing
C
．
repair
D
．
repaired
13
．
Not until Peter got home _______________ that he had lost his keys.
A
．
did he realize
B
